WO3-based NO2 sensors fabricated through low frequency AC electrophoretic deposition

Heidari, Elham Kamali; Zamani, Cyrus; Marzbanrad, Ehsan; Raissi, Babak; Nazarpour, Soroush

doi:10.1016/j.snb.2010.01.073

Cited by 78 publications

(35 citation statements)

References 26 publications

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“…It has an atomic number of 79,a relative atomic mass of 196.9665,and is a member of subgroup IB of the periodic table. [4] Go ld Oxide is a highly insoluble thermally stable Go ld source suitable for glass, optic and ceramic Go ld o xide is a red-brown solid that is the most stable oxide of gold, but decomposes at 160 °. They are co mpounds containing at least one oxygen anion and one metallic cation.…”

Section: Electrical Resistivity Of Auomentioning

confidence: 99%

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Review on Electrical Resistivity of Oxide Materials Using Fuzzy Logic

2015

IJAERD

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Section: Electrical Resistivity Of Auomentioning

confidence: 99%

“…Silver-o xygen system (AgO) was extensively attracted by researchers due to its novel applications in high density optical storage devices, gas sensors, photovoltaic cells, photo diodes, and antibacterial coatings [1][2][3][4][5][6]. This system exists in d ifferent defined compounds, namely, Ag 2 …”

Section: Electrical Resistivity Of Agomentioning

confidence: 99%

Review on Electrical Resistivity of Oxide Materials Using Fuzzy Logic

2015

IJAERD

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“…These suspended particles are forced to follow a specific path by properly designed electric field and cover the desired region of the substrate. 22 This technique has already been employed for fabrication of the sensors based on mesoporous WO 3 , 23 ZnO nanowires and nanoparticles, 24,25 TiO 2 nanoparticles 26,27 and In 2 O 3 nanoparticles and nanoribbons. 28,29 In our previous work regarding TiO 2 nanoparticles, stable sensors with high responses in the temperature range of 450-550 • C using AC EPD were obtained.…”

Section: Introductionmentioning

confidence: 99%

Electrospun TiO2 nanofibre-based gas sensors fabricated by AC electrophoresis deposition

2015

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In this paper, gas sensing properties of the sensor based on titanium dioxide (TiO 2 ) nanofibres are reported. These nanofibres were synthesized through electrospinning of polyvinyl pyrrolidone (PVP) / titanium tetra isopropoxide. Calcination of the obtained amorphous PVP/TiO 2 nanofibres resulted in nanofibres of TiO 2 with the same morphology. In this step, scanning electron microscopy and X-ray diffraction were applied in order to analyse these nanofibres. Then, nanofibres of TiO 2 were deposited selectively by AC electrophoretic deposition on interdigitated electrodes and exposed to different concentrations of NO 2 (8-50 p.p.m.) at 450-550 • C. Gas sensing measurements illustrated that this sensor had adequate response to target gas at 450 • C. The maximum response of gas sensors, S (the ratio of sensor resistances S = R gas /R N2 ), achieved was around 30 for 50 p.p.m. NO 2 at 450 • C.

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“…Our main concern was to lead the particles into the electrode gap so that a thick deposit was formed regardless of their alignment relative to electric field lines. The method was then successfully employed to fabricate WO 3 ‐based NO 2 sensors . Although the ultrafine WO 3 particles bridged the electrode gap by chaining at 10 kHz, the mechanism of PCF was not explored there.…”

Section: Introductionmentioning

confidence: 99%

“…The method was then successfully employed to fabricate WO 3 -based NO 2 sensors. 25 Although the ultrafine WO 3 particles bridged the electrode gap by chaining at 10 kHz, the mechanism of PCF was not explored there.…”

Section: Introductionmentioning

confidence: 99%

Effect of Low Frequency Electric Field Parameters on Chain Formation of ZnO Nanoparticles for Gas Sensing Applications

et al. 2012

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In present study, the effect of low frequency electric field parameters on pearl chain formation (PCF) behavior of ZnO nanoparticles was investigated using co‐planar electrodes. The optical microscopy images of the deposition patterns obtained at the frequency range of 1 Hz–10 kHz revealed that below 10 kHz, Coulomb force, unsteady‐state fluid flow and Alternating‐electro‐osmotic phenomenon dominate the deposition process preventing directional assembly of particles into chains. However, at 10 kHz the ZnO nanoparticles were observed to form chainlike patterns along the electric field lines bridging the interelectrode gap which was attributed to the dielectrophoresis force. The optimized PCF conditions were then employed to fabricate a CO gas sensor which showed a clear response to the target gas at 400°C, 450°C and 500°C. The porous layer obtained at 10 kHz also showed higher response to 3–17 ppm of NO2 at 250°C–500°C which was attributed to easier gas flow through the layer and more reaction area compared with the dense film made using the sedimentation technique.

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WO3-based NO2 sensors fabricated through low frequency AC electrophoretic deposition

Cited by 78 publications

References 26 publications

Review on Electrical Resistivity of Oxide Materials Using Fuzzy Logic

Review on Electrical Resistivity of Oxide Materials Using Fuzzy Logic

Electrospun TiO2 nanofibre-based gas sensors fabricated by AC electrophoresis deposition

Effect of Low Frequency Electric Field Parameters on Chain Formation of ZnO Nanoparticles for Gas Sensing Applications

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